Omron's G9SX is an innovative flexible safety unit that offers partial or complete safeguarding of a machine control system. It is Omron's logical alternative to hardwired safety circuits, and is a reliable, low maintenance platform for advanced safety-control systems.

The G9SX uses microprocessor technology to provide a transparent, logical connection throughout an entire machine, enabling any segment of the machine to be shut down according to its safety layout. In this way, a faulty process within a machine can be isolated, instead of having to switch off the entire system, which minimises production losses and downtime.

The G9SX used microprocessor technology to manage a unique, hardwire-based dynamic 'safety carrier signal' that forms a logical connection between these flexible safety units and the machine. This 'safety carrier signal' produces an easy parallel-wired structure of logical 'AND' connections to determine a partial or complete shutdown, instead of using a complex combination of conventional relay outputs. It also provides a continuous system check to ensure the highest safety integrity at all times; even complex machines can be easily segmented for more precise shut down during faultfinding or machine maintenance.

The G9SX range comprises a basic unit (G9SX-BC), two advanced units (G9SX-AD and G9SX-ADA) and an expansion unit (G9SX-EX).

• The basic unit (just 22.5mm wide) contains two solid-state safety (instantaneous) outputs, two logical 'AND' outputs, two auxiliary monitoring outputs and six LED indicators, and performs an emergency stop function to shut down the entire machine.

• The advanced units can be connected to this basic unit or other advanced units to shut down individual sections in a machine, without affecting the total process. Each advanced unit contains five solid-state safety outputs (two of which can be used with off-delay), two logical 'AND' outputs, two auxiliary monitoring outputs and eight LED indicators. Up to four advanced units can be connected in parallel to one logical 'AND' output to meet growing safety requirements.
  
• Each expansion unit provides four relay outputs, and up to five expansion units can be connected together to one advanced unit to provide up to 25 outputs, if required.

Diagnosis LEDs on the G9SX indicate the entire status of the system, including power supply, safety inputs and outputs, feedback input, logical 'AND' connection, and error status.

Unlike conventional relays, the safety outputs of the G9SX-BC and G9SX-AD are solid state, so there are no mechanical parts to wear out. This design is very effective for frequent switching cycles. The G9SX also offers a choice of terminals: a screw-less spring-type or screw type. These terminals feature plug-in wiring connectors that are easily detachable for fast and easy maintenance.

Innovative machinery requires innovative concepts, and the G9SX concept supports machine design to achieve highly effective systems with superior flexibility, with the added benefits of reliability and availability.